Derby Ave SW over Stream
PoorPosted for loadJohnson County, Iowa · 078083402 · Structure no. 000000000203860
- Built
- 1954
- 71 years old
- Condition
- Poor
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 20 ft
- 1 main span
- Daily traffic
- 60
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Derby Ave SW over Stream is a wood or timber stringer/multi-beam or girder carrying Derby Ave SW over Stream in Johnson County, Iowa. It was built in 1954, so it is 71 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 60 vehicles a day, projected to reach 60 by 2044. The structure is 20 ft (6.1 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Derby Ave SW over Stream built?
It was built in 1954, making it 71 years old in 2025.
What condition is Derby Ave SW over Stream in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.
How much traffic does Derby Ave SW over Stream carry?
About 60 vehicles per day (2021 count).
How long is Derby Ave SW over Stream?
The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 20 ft wide.
Who owns Derby Ave SW over Stream?
It is owned by the County Highway Agency.